What was found
(CAN) WHILE IN CRUISE FLIGHT THE PILOT NOTICED NR 2 ENGINE TOT WAS HIGHER THAN THAT OF NR 1 ENGINE. PILOT ATTEMPTED TO CARRY OUT A POWER CHECK ON NR 2 ENGINE BUT WAS UNABLE TO COMPLETE THE CHECK DUE TO TOT REACHING RED LINE.AIRCRAFT RETURNED TO BASE AND THE AME CARRIED OUT A VISUAL INSPECTION OF THE AIRCRAFT AND ENGINE. INSPECTION OF THE TURBINE AREA REVEALED A CRACK ACROSS THE REINFORCED AREA OF THE ARMPIT OF THE OUTER COMBUSTION CASE. THE OUTER COMBUSTION CASE WAS CHANGED AND THE A/C RETURNED TO SERVICE WITH NO FURTHER INCIDENT.